Weird Arm Track feedback

Hey,

I'm just testing out the web version on Ableton 10 with Open Stage Control. Sending Midi Channel 2 data to Ableton. Made very simple script to test (volume, panning, arm track) on track 3 and volume and panning work great. But the arm track button is spazzing out and sending loads of data. Goes away when I delete the track.

Hard to take a screenshot but its just flashing very fast and I can't un-trigger it in OSC. I tried setting thevalues of the button deifferently to a tap instead of toggle and changing CC values.

Any advice?

Cheers
Fabian